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Vulnerability · Published Mar 4, 2024 · Assigned by Linux

CVE-2021-47086phonet/pep: refuse to enable an unbound pipe

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 86.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: phonet/pep: refuse to enable an unbound pipe This ioctl() implicitly assumed that the socket was already bound to a valid local socket name, i.e. Phonet object. If the socket was not bound, two separate problems would occur: 1) We'd send an pipe enablement request with an invalid source object. 2) Later socket calls could BUG on the socket unexpectedly being connected yet not bound to a valid object.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.15-1DEBIAN-CVE-2021-47086
Debian:13linux5.15.15-1DEBIAN-CVE-2021-47086
Debian:14linux5.15.15-1DEBIAN-CVE-2021-47086
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47086
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47086
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47086

Affected products (as reported)

VendorProductVersions
Linux Linux bdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before 0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59bdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before b10c7d745615a092a50c2e03ce70446d2bec2acabdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before 311601f114859d586d5ef8833d60d3aa23282161bdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before 982b6ba1ce626ef87e5c29f26f2401897554f235bdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before 48c76fc53582e7f13c1e0b11c916e503256c4d0bbdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before 52ad5da8e316fa11e3a50b3f089aa63e4089bf52bdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before 53ccdc73eedaf0e922c45b569b797d2796fbaafabdb6e697b2a76c541960b86ab8fda88f3de1adf2 – before 75a2f31520095600f650597c0ac41f48b5ba0068
Linux Linux 3.3

References